Abstract
The shape of a coherent non-misfitting FeC precipitate formed from solute atoms that interact with a dislocation stress field was studied using kinetic Monte Carlo simulation on a rigid lattice. The system studied is a model for binary alloys with an interstitial alloying element similar to Fe–C. The interaction with the dislocation comprises both a short-range chemical term and a long-range deformation field. The effect of each of these terms on precipitate shapes for different C supersaturations was investigated. A simple analytical model is proposed to rationalize the results obtained in the atomistic simulations.
Acknowledgements
This work was funded by the joint research programme “Precipitation” between CEA, Arcelor, CNRS and Pechiney-Alcan. We gratefully acknowledge useful and stimulating discussions with Bernard Legrand and Vincent Barbe.